Surgical motor



A. PFEIFFER SURGICAL MOTOR Filed June 27, 1925 7 @lol/a' @2J-27226271 Patented Sept. 4, 1928.,

unirsi)` sra-TES mehr rnnirrnn, or BERLIN, GERMANY, AssIGNon 'ro THE mm'nmixrnizlr'rsensnmscmm sANI'iAs f M. n. H., on BERLIN, GERMANY.

SURGICAL Moron.

Application ledvil'une 27, 1925, SerialA No. '40.070, and in Germany July 8, 1924.

My invention relates to improvements in electric systems for surgical and similar apparatus, such for example as apparatus for producing a current of heated air, vibratorsl e and the like. Apparatus of this type are provided in a casing adapted to be carried bythe hand of the operator and including a small electric motor. ln apparatus of this type the electrical connections of the leads 1Q with the motor, the heating body, the switch and other apparatus'cannot easily be made, and the leads are subject to injury when `in serting the motor. The object of the imrovements is to -provide an electric system l or apparatus of this type in which the said objections are obviated, and with this object in view the casing and the frame of the motor are provided with cooperating contact members disposed so that when inserting the motor the leads are directly connected with their terminals.

For the purpose of explaining the invention an example embodying the same has been shown in the accompanying drawing, in which the same reference characters have been used in all the views to indicate corresponding parts. In,y said drawing,

Fig. 1, is a sectional elevation showing an electric ian, the removable front portion of the fan casing being removed,

Fig. 2, is a sectional elevation taken on the line 2-,2 of Fig. 1,

l Fig. 3, is a partial sectional view on an enlarged scale showing the support for the terminals carried'by the motor casing, and

Fig. 4,. is a top-plan view of the said suport. P For the purpose of describing the invention reference will be made to an electric fan 4o of known construction adapted to be carried by the hand of the person using the same,

and provided with an electric motor and heating means. But I wish it to be understood that my invention is not limited to the embodiment in an apparatus of this type, and that it may be used in surgical or other appxratus includingla small. electric motor.

the example s own in Fig. 1 the apparatus consists of a casing comprising a chamber 1 including a fan 3 8, a chamber 2 of smaller diameter and including an electric motor 36, and a chamber 3 the diameter of which is further reduced, and which includes a switch 37 mechanically and electrically '1 connected with the motor, The part 1" of the c asing is made integral with a tubular delivery portion et carrying. a hood. 5. The body portion of the said hood is, formed with openings Separated from each other by a bridge portion 6, the said openings permitting the. flow of the air from the chamber 1.

The hood 5carries a delivery vpipe 7 'enclo'sing an electric heating body 8. At its inner en d the heating body is provided with electric plugs 9A engagingin contact'sleeves 10 65 secured to the bridge 6. The sleeves` 10 are 'provided with rear extensions 11 in the form of lugs.

o the inner Wall of the portion 2 ofthe motor casing a sheet metal plate 12 is secured, which is formed at both sides with ears 13 carrying brackets 14. To the-said brackets Contact sleeves 15 are secured the axes oi.V which are parallel to the axis of the motor casing. On the frontend of the said plate there isa guide member 16 in the form of a dovetail. On' the outer wall of the portion 2 of the casing and at the part thereof adjacent to the plate 12 there is a cylindrical body 17 fitting on the outer wall ofthe casing. Screws 18 passed through the body 17," bores of the wall ofthe casing, the plate 12 and into the guide members 16 hold the parts 16 and 17in clamping engagementwith the plate 12 and the wall of the casing 2. A

The stator 19 of the motor 36 is formed at its bottom with a recess 20 corres ending to the guide way 16. Further, the ame 2l of the motor is provided with eyes or lugs 22 carrying each a contact plug 24, which plugs are in position for engaging in the contact sleeves 15' when placing the stator on the guide way 16, the plugs being completely inserted into thesaid sleeves by completely shifting the-motor into the-casing. Therefore the guide way 16 has the function, first to fix the motor within the casing, and second to insure the proper engagement of the plugs 24 in the sleeves 15. From the plugs 24 the current is distributed to the motor, the 10oswitch, and the heating coil.' For supplying current to the heating coil two leads 27 are provided, which are passed through a peripheral recess 26 in the iron body ofthe stator and 'closed at the peri hery'by a plate 105 25. At their ends the said eads carry contact sleeves 28 corresponding to the plugs 11 of the heating coil.

To the plate 12 a tubular member 29 having external screw-threads is secured, which 110 passes throughj holesmade ing the leads 32 for supplyin tively in the wall of the casing 2 and the body 17, To the said member a handle 30 'is secured, which, as shown, is provided with an internally screw-threaded bushing 31 on the member 29. Thenhandle is i Y' 15 are outside the casing and before fixing the plate 12 in .position the casing.

I wish it to be understood that my invention is not limited to the construction of the contact members shown in thedrawing and that in some cases I provide contacts in the form'of blades, slide contacts, spring pressed contact members etc. Y

In the example shown in the figures the eyes orlugs 22 are made integral with the frame 21. But I do not limit myself to this construction, and in some cases I provide the said eyes on a` yoke screwed or otherwise secured to the frame 21.

While in describing the invention reference has been made to a particular example embodying the same I wish it to be understood that my invention is not limitedto the construction shown in the drawing, and that various changes may be made in the general arrangement o f the apparatus and the construction of its parts without departing from the invention.

I claim:

1. The combination, with a casing, an elec'- tromotor mounted therein, a supporting plate fixed to the inner wall of said casing and havin inwardly projecting lugs, and sleeves an lugs provided respectively on said. lugs and motor, saidl sleeves and plugs opposing ,eachother in the direction of insertion of the motor so as to make direct contact with each other whenY inserting` the motor. i

2. The combination, with a casing, a supportin member fixed internally to the wall thereo forming a longitudinal guide, an electromotor mounted on said member and having a longitudinal slot receiving said member, and terminals provided respectively on saidmember and motor, said terminals lon the motor and member opposin each other in the direction of insertion of t e motor so as to make direct contactwith each other when inserting the motor.

3. The combination, with a-casing, a suprting member in the form of a dovetail internally to the wall thereof, an electromotor mounted on s'aidmember, and terwith an axial bore in alignment minals provided respectively on said member and motor, said terminals on the motor@ rection of insertion of the motor so las tol and memben opposing each other in the dimake direct contact with other when'.l

port, and terminals provided respectively on said member and motor, said terminals on thefmotor and member opposing each other in the direction of insertion of the motor so as to make direct contact with each other when inserting the motor. v

5. The combination, wi h a casing, an electromotor mounted therein, a supporting plate mounted on the inner wallv of said casing, a block provided on the outer face of the casing at the part thereof adjacent to said plate, screws passsed through said block and the wall of said casing and said plate for clamping said parts together, and terminals provided respectively on said plate and motor, said terminalsl on the motor and plate opposing each other in the direction of insertion of the motor so as to make direct contact with each other when inserting the motor.

6. The combination, with a casing, an electromotor mounted therein,l plug .andI sleeve contacts provided respectively on said casing and motor,and means guiding the motor in its insertion movement in such manner that during this movement the plugs and sleevesare positively held in coaxial alinement with each other.

7. The combination with supporting member forming a longitudinal guide'fixed internally to the .wall of; said casing, an electromotor mounted on said member and having a longitudinal slot receiving said membein 8. The combination with a casing, ofa supporting member in the form of a dovetail fixed lntern'ally to the wall of said casing, and an electromotor having a recess in the form of a dovetail engaging the dovetail of said support.

9.- 'Ihe combination with a casing, of .an electromotor mounted therein, a supporting member for said motor mounted on the.

inner wall of sai-d casing, a block provided on the outer'face of the casing in opposition to said supporting member and means for clamping together said supporting member, casing wall and block.

In testimony whereof I affix my signature.

' AnoLF PFEIFFER;

a casing, of a 

